- If, at time \(t = 0\), the velocity and displacement are zero, can you describe, draw or imagine what the journey is like? - Which direction are you travelling in? Are you speeding up or slowing down? 
- Approximately, for what value of \(c\) is there no negative velocity? - What feature of the journey changes when there is no negative velocity? 
- What feature of the displacement graph changes when there is no negative velocity? 
 
- The acceleration function is negative for the first \(4\) seconds. What does this mean is happening to the object when, - \(c = 0\)?
- \(c = 3\)?
- \(c = 2\)?
 
- Now let’s think about \(c=0\) and \(d=2\). How would you describe the journey, and how does it differ from the journey in question 1?
 
